CN112421289B

CN112421289B - Sealing member and connector

Info

Publication number: CN112421289B
Application number: CN202010830916.5A
Authority: CN
Inventors: 南野祐也
Original assignee: Yazaki Corp
Current assignee: Yazaki Corp
Priority date: 2019-08-20
Filing date: 2020-08-18
Publication date: 2021-11-05
Anticipated expiration: 2040-08-18
Also published as: US11081830B2; JP2021034153A; EP3783747B1; EP3783747A1; CN112421289A; JP7106227B2; US20210057845A1

Abstract

The present invention improves assembly workability. It is provided with: an elastic body (11) which is in close contact with the outer peripheral surface of the plurality of electric wires (We) and the inner peripheral surface (31b) of the electric wire accommodating part (31); and a rigid body (12) whose rigidity is higher than that of the elastic body, and The rigid body has a plurality of wire insertion holes through which wires can be inserted one-to-one coaxially, and has a concave or convex fitted portion. The fitted portion is arranged opposite to the opening in the wire accommodating portion and is fitted into the fitting portion of the holding member that is accommodated in the wire accommodating portion at a position closer to the opening than the rigid body itself, and the elastic body is inserted into each wire. The through hole has a first sealing portion that is in close contact with the inner peripheral surface of the electric wire insertion hole and the outer peripheral surface of the electric wire inserted through the electric wire insertion hole, and has a close contact with the outer peripheral surface of the rigid body in the electric wire accommodating portion. The second sealing portion that is attached to the inner peripheral surface of the electric wire accommodating portion.

Description

Sealing member and connector

Technical Field

The present invention relates to a sealing member and a connector.

Background

Conventionally, there is known a connector including: a plurality of terminals with electric wires; and a housing that accommodates the plurality of terminals with electric wires and draws out the electric wires of the respective terminals with electric wires to the outside. In this conventional connector, a sealing member is provided for each wire (patent document 1). The sealing member is formed in an annular or cylindrical shape, and the inner peripheral surface side is brought into close contact with the outer peripheral surface of the electric wire, and the outer peripheral surface side is brought into close contact with the inner peripheral surface of the housing covering the electric wire, whereby the liquid (water or the like) is prevented from entering the terminal fitting side along the outer peripheral surface of the electric wire and the inner peripheral surface of the housing. In this conventional connector, a holding member (so-called rear holder) is provided to suppress positional displacement of each seal member to the outside of the housing.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2018-156723

Disclosure of Invention

Technical problem to be solved by the invention

However, in the conventional connector, the sealing member is mounted on the electric wire in an axially offset manner, the electric wire is accommodated in the housing together with the terminal fitting connected to the terminal, and the sealing member is accommodated in the housing while being slid on the electric wire. In the conventional connector, this operation is performed for each electric wire. In the conventional connector, in order to exhibit the liquid-proof performance of the sealing member, it is necessary to perform work so that the sealing member does not shift or twist during the housing work of the sealing member. Therefore, the conventional seal member and connector have room for improvement in terms of assembly work.

Therefore, an object of the present invention is to provide a seal member and a connector which can improve assembling workability.

Means for solving the problems

In order to achieve the above object, a seal member according to the present invention includes: an elastic body that is in close contact with outer peripheral surfaces of a plurality of parallel wires for each of the wires and with an inner peripheral surface of a wire housing that houses the plurality of wires inside and draws out the plurality of wires from an opening to the outside; and a rigid body having an outer peripheral surface that is disposed in the wire housing portion so as to face the inner peripheral surface of the wire housing portion with a space therebetween, the rigid body having a plurality of wire insertion holes through which the wires are coaxially inserted one by one, and the rigid body having an engaged portion that is disposed in the wire housing portion so as to face the opening and into which an engaging portion of a holding member that is housed in the wire housing portion on the opening side with respect to the rigid body itself is engaged in an axial direction of the wire insertion holes, the engaged portion being formed in a concave shape that is concave in the axial direction when the engaging portion is convex, the engaged portion being formed in a convex shape that is convex in the axial direction when the engaging portion is concave, the elastic body has a cylindrical 1 st seal portion for each of the wire insertion holes, the 1 st seal portion being in close contact with the outer peripheral surface of the wire inserted in the wire insertion hole with respect to the inner peripheral surface of the wire insertion hole, and the elastic body has a cylindrical 2 nd seal portion, the 2 nd seal portion being in close contact with the inner peripheral surface of the wire housing portion in the wire housing portion with respect to the outer peripheral surface of the rigid body.

Preferably, the fitted portion is provided between the adjacent wire insertion holes.

Preferably, the fitted portions are disposed between the adjacent wire insertion holes, and are disposed close to one outer peripheral surface side and the other outer peripheral surface side of the rigid body, respectively, when viewed from an imaginary line connecting shafts of the adjacent wire insertion holes.

Preferably, the rigid body has 2 of the wire insertion holes formed in the same shape, and an outer shape of one of the wire insertion holes and an outer shape of the other of the wire insertion holes are formed in a symmetrical shape on the one of the wire insertion holes and the other of the wire insertion holes when viewed from an inter-axis center of the 2 wire insertion holes, and the fitted portions are provided on each outer wall surface in the axial direction of the rigid body.

In order to achieve the above object, a connector according to the present invention includes: a terminal with an electric wire to which a terminal fitting is connected at a terminal of the electric wire; a housing that accommodates a plurality of the terminals with electric wires therein and that draws out the electric wires of the terminals with electric wires to the outside; a sealing member that seals a gap between outer circumferential surfaces of the plurality of electric wires and an inner circumferential surface of the housing; and a holding member that holds the sealing member, the housing having an electric wire housing that houses the plurality of electric wires therein and draws out the plurality of electric wires from an opening to the outside, the sealing member including: an elastic body which is in close contact with the outer peripheral surfaces of the plurality of parallel electric wires for each electric wire and is in close contact with the inner peripheral surface of the electric wire housing; and a rigid body having an outer peripheral surface that is disposed in the wire housing portion so as to face the inner peripheral surface of the wire housing portion with a space therebetween, the rigid body having a plurality of wire insertion holes through which the wires are coaxially inserted one by one, and the rigid body having an engaged portion that is disposed in the wire housing portion so as to face the opening and that is engaged with an engaging portion of a holding member that is housed in the wire housing portion on the opening side with respect to the rigid body itself, in an axial direction of the wire insertion holes, the engaged portion being formed in a concave shape that is concave in the axial direction when the engaging portion is convex, and being formed in a convex shape that is convex in the axial direction when the engaging portion is concave, the elastic body has a cylindrical 1 st seal portion for each of the wire insertion holes, the 1 st seal portion being in close contact with the outer peripheral surface of the wire inserted in the wire insertion hole with respect to the inner peripheral surface of the wire insertion hole, and the elastic body has a cylindrical 2 nd seal portion, the 2 nd seal portion being in close contact with the inner peripheral surface of the wire housing portion in the wire housing portion with respect to the outer peripheral surface of the rigid body.

Effects of the invention

The sealing member according to the present invention includes: a wire insertion hole and a 1 st sealing part for each wire; and a 2 nd sealing part corresponding to an inner circumferential surface of the electric wire housing part. In contrast, the conventional sealing member must be assembled for each electric wire and be accommodated in the housing for each electric wire. Therefore, the sealing member and the connector according to the present invention can improve the assembling workability as compared with the conventional sealing member and connector.

Drawings

Fig. 1 is an exploded perspective view of a connector of an embodiment, which is shown together with a seal member.

Fig. 2 is a perspective view showing the sealing member and the connector according to the embodiment, and shows a state after the electric wire is accommodated.

Fig. 3 is a perspective view of the sealing member and the connector according to the embodiment viewed from another angle, and shows a state after the electric wire is accommodated.

Fig. 4 is a plan view showing the sealing member and the connector according to the embodiment, and shows a state after the electric wire is accommodated.

Fig. 5 is a cross-sectional view taken along line X-X of fig. 4, showing the periphery of the seal member and the installation location of the seal member.

Fig. 6 is a perspective view showing the seal member and the connector according to the embodiment, and shows a state after the assembly between the seal member and the holding member is completed.

Fig. 7 is a plan view showing the seal member and the connector according to the embodiment, and shows a state after the assembly between the seal member and the holding member is completed.

Fig. 8 is a cross-sectional view taken along line X-X of fig. 7, showing the periphery of the seal member and the installation location of the seal member.

Fig. 9 is a perspective view showing a state after assembly of the connector of the embodiment is completed.

Fig. 10 is a plan view showing a state after assembly of the connector of the embodiment is completed.

Fig. 11 is a cross-sectional view taken along line X-X of fig. 10, showing the periphery of the seal member taken out.

Fig. 12 is a perspective view showing the seal member.

Fig. 13 is a perspective view of the seal member viewed from another angle.

Fig. 14 is a plan view showing the seal member.

Fig. 15 is a perspective view showing a rigid body of the seal member.

Fig. 16 is a perspective view of the rigid body of the seal member viewed from another angle.

Fig. 17 is a perspective view showing a holding member of the holding member.

Fig. 18 is a perspective view of the holding member viewed from another angle.

Description of the symbols

1 connector

10 sealing member

11 elastomer

11a 1 st seal

11b 2 nd seal part

12 rigid body

12a outer peripheral surface

12b wire insertion hole

12b₁Inner peripheral surface

12c, 12d outer wall surface

12e fitting part

20 terminal fitting

20W terminal with wire

30 casing

31 electric wire housing part

31a opening

31b inner peripheral surface

40 holding member

40a fitting part

L imaginary line

We electric wire

Detailed Description

Hereinafter, embodiments of the seal member and the connector according to the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.

[ embodiment ]

One embodiment of the seal member and the connector according to the present invention will be described with reference to fig. 1 to 18. Hereinafter, the sealing member will be described in the description of the structure of the connector.

Reference numeral 1 in fig. 1 to 11 denotes a connector of the present embodiment. In addition, reference numeral WH in fig. 1 to 11 denotes a connector-equipped electric wire according to the present embodiment. The connector-equipped electric wire WH is a member in a state where the connector 1 is attached to the end of the electric wire We. Note that, reference numeral 10 in fig. 1 to 8 and 11 denotes a seal member according to the present embodiment.

The connector 1 of the present embodiment is inserted into and fitted to a mating connector (not shown) to be electrically connected to the mating connector, and is pulled out from the mating connector to be electrically disconnected from the mating connector.

The connector 1 of the present embodiment includes a conductive terminal fitting 20 (fig. 1). The terminal fitting 20 is formed into a predetermined shape from a conductive material such as metal (copper, copper alloy, aluminum alloy, or the like). The terminal fitting 20 may be a terminal fitting formed in a female terminal shape or a terminal fitting formed in a male terminal shape. Here, the terminal fitting 20 is physically and electrically connected to the end of the electric wire We, thereby becoming an electric wire-attached terminal 20W. For example, the terminal fitting 20 may be electrically connected by crimping to the end of the electric wire We by caulking, or may be electrically connected by fastening by welding or the like. The connector 1 of the present embodiment includes a plurality of terminals 20W of the live wire. The connector 1 in this example is provided with 2 wired terminals 20W. The electric wire We shown here has a circular cross section orthogonal to the axial direction thereof.

The connector 1 of the present embodiment includes a housing 30 (fig. 1 to 11) that accommodates a plurality of terminals 20W with electric wires therein. The case 30 is molded from an insulating material such as synthetic resin. A plurality of wired terminals 20W are accommodated in parallel in the housing 30. The housing 30 draws out the electric wire We of the housed electric wire-equipped terminals 20W to the outside. The housing 30 has a wire housing portion 31 (fig. 1 to 11) that houses the plurality of wires We inside and draws the plurality of wires We outward from the opening 31 a. The wire housing 31 is formed in a cylindrical shape, and houses the wires We of the respective wired terminals 20W in a parallel state in a space inside the cylindrical portion. In the housing 30 of this example, 2 wired terminals 20W are accommodated. The wire housing 31 of this example is formed in an oval cylindrical shape, houses the wires We of the 2 wire-attached terminals 20W in parallel in the longitudinal direction thereof, and is drawn out from the opening 31a to the outside while keeping the wires We in a parallel state.

Further, the connector 1 of the present embodiment includes: a sealing member 10 that seals a gap between outer circumferential surfaces of the plurality of electric wires We and an inner circumferential surface of the housing 30; and a holding member (so-called rear holder) 40 that holds the seal member 10 (fig. 1 to 11). The sealing member 10 is accommodated in the wire accommodating portion 31, and the wire accommodating portion 31 seals a gap between the outer peripheral surfaces of the plurality of wires We and the inner peripheral surface of the wire accommodating portion 31. Thus, even if a liquid such as water enters the wire housing 31 through the opening 31a, the liquid can be prevented from entering the wire housing 31 forward of the sealing member 10 (i.e., toward the terminal fitting 20). In order to suppress the positional deviation of the sealing member 10 accommodated in the predetermined position of the wire accommodating portion 31 toward the opening 31a, the holding member 40 is accommodated in the wire accommodating portion 31 at a position closer to the opening 31a than the sealing member 10, and holds the sealing member 10 in the predetermined position of the wire accommodating portion 31. Thereby, the holding member 40 can hold the liquid-proof performance of the sealing member 10 in the wire housing 31. For example, the housing 30 may be provided with an engagement portion (not shown) that engages the seal member 10 on the side opposite to the holding member 40 and sandwiches the seal member 10 together with the holding member 40.

The sealing member 10 includes: an elastic body 11 that is in close contact with the outer peripheral surfaces of the plurality of parallel electric wires We for each electric wire We and is in close contact with the inner peripheral surface of the electric wire housing 31; and a rigid body 12 having a higher rigidity than the elastic body 11 and having an outer peripheral surface 12a (fig. 1 to 3, 5, 8, and 11 to 14) which can be disposed in the wire housing 31 so as to face the inner peripheral surface 31b of the wire housing 31 with a space therebetween. The elastic body 11 is formed of an elastic material such as rubber. The rigid body 12 is formed to have higher rigidity than the elastic body 11 and to have hardness capable of returning a force received from the elastic body 11 as it is as a reaction force. The rigid body 12 is molded from a material (for example, a synthetic resin material) capable of having the properties after molding. The seal member 10 is integrally molded by, for example, insert molding in which an elastic material (an elastic material constituting the elastic body 11) is injected into a mold in which the rigid body 12 is accommodated.

The rigid body 12 is formed into an external shape in which the outer peripheral surface 12a can be arranged at substantially equal intervals over the entire circumference with respect to the inner peripheral surface 31b of the wire housing 31. The rigid body 12 has a plurality of wire insertion holes 12b (fig. 1 to 3, 5, 8, and 11 to 16) through which the wires We can be coaxially inserted one by one.

The elastic body 11 has a cylindrical 1 st seal part 11a for each wire insertion hole 12b, and the 1 st seal part 11a is provided on an inner peripheral surface 12b of the wire insertion hole 12b₁And is in close contact with the outer peripheral surface of the electric wire We inserted into the electric wire insertion hole 12b (fig. 12 to 14). The elastic body 11 has a cylindrical 2 nd seal part 11b, and the 2 nd seal part11b are in close contact with the inner peripheral surface 31b of the wire housing 31 in the wire housing 31 with respect to the outer peripheral surface 12a of the rigid body 12 (fig. 12 to 14). The 1 st seal part 11a has an annular lip 11a which is brought into close contact with the outer peripheral surface of the electric wire We by bending itself₁(fig. 12 to 14). In the 1 st seal portion 11a, a plurality of lip portions 11a are arranged in line along the cylindrical axis direction thereof₁. The 2 nd seal part 11b has an annular lip 11b which is bent to be in close contact with the inner peripheral surface 31b of the wire housing 31₁(fig. 12 to 14). In the 2 nd seal part 11b, a plurality of lip parts 11b are arranged in line along the cylindrical axis direction thereof₁。

For example, the rigid body 12 shown here has 2 wire insertion holes 12b formed in the same shape, and the outer shape of one wire insertion hole 12b side and the outer shape of the other wire insertion hole 12b side are formed in symmetrical shapes on the one wire insertion hole 12b side and the other wire insertion hole 12b side as viewed from the center between the shafts of the 2 wire insertion holes 12 b. The rigid body 12 of this example is shaped like a plate, which is oblong in accordance with the shape of the inner peripheral surface 31b of the wire housing 31 and has 2 outer wall surfaces 12c, 12d orthogonal to the axial direction of the wire insertion hole 12b (fig. 15 and 16). However, in the rigid body 12, grooves and through-holes into which a part of the elastic body 11 is inserted are provided at appropriate plural locations in order to continuously hold the elastic body 11 that is integrally molded. In addition, in the rigid body 12 of this example, 2 circular wire insertion holes 12b are formed in a row in the longitudinal direction of the oval shape. Therefore, in the elastic body 11 of this example, there are provided: having a plurality of annular lips 11a₁The cylindrical first seal portion 11a of (1); and a lip portion 11b having a plurality of oblong annular ring shapes₁The second seal part 11b of an oblong cylindrical shape.

The sealing member 10 of this example has 2

outer wall surfaces

10a, 10b (fig. 12 and 13) orthogonal to the axial direction of the wire insertion hole 12 b. The outer wall surfaces 10a and 10b are formed by the outer wall surface of the elastic body 11 and the outer wall surfaces 12c and 12d of the rigid body 12. The seal member 10 of this example may be housed in the wire housing 31 in a state where one outer wall surface 10a faces the opening 31a, or may be housed in the wire housing 31 in a state where the other outer wall surface 10b faces the opening 31 a.

As previously shown, the sealing member 10 is held by the holding member 40. Therefore, the rigid body 12 is provided with a fitting-receiving portion 12e, the fitting-receiving portion 12e is disposed in the wire housing 31 so as to face the opening 31a, and the fitting portion 40a of the holding member 40 is fitted in the axial direction of the wire insertion hole 12b (fig. 1 to 3 and 12 to 16). The fitted portion 12e is formed in a concave shape recessed in the axial direction thereof if the fitting portion 40a is convex, and formed in a convex shape protruding in the axial direction thereof if the fitting portion 40a is concave. In this example, the fitted portion 12e is formed in a concave shape, and the fitting portion 40a is formed in a convex shape. The fitting target portion 12e and the fitting portion 40a in this example are each formed in a rectangular parallelepiped shape.

The fitted portion 12e is provided between the adjacent wire insertion holes 12b (fig. 12 to 16). For example, the fitted portion 12e is disposed between the adjacent wire insertion holes 12b, and is disposed close to one outer peripheral surface 12a side and the other outer peripheral surface 12a side of the rigid body 12, respectively, when viewed from a virtual line L connecting the shafts of the adjacent wire insertion holes 12b (fig. 14). The fitting target portion 12e of this example is provided on each of the outer wall surfaces 12c and 12d of the rigid body 12 so that any one of the 2 outer wall surfaces 10a and 10b faces the opening 31a in the wire housing portion 31. Here, 2 fitting portions 12e are formed on the outer wall surfaces 12c and 12d, respectively, closer to the outer peripheral surface 12a sides of the two when viewed from the virtual line L.

The holding member 40 is molded from an insulating material such as synthetic resin. The holding member 40 may be formed as 1 member, or may be formed by assembling and integrating a plurality of members. The illustrated holding member 40 includes 2 holding members 41 (fig. 1 to 11, 17, and 18) having the same shape, and the 2 holding members 41 are assembled and integrated with each other in a direction (the axial direction of the electric wire We) orthogonal to the axial direction of the electric wire insertion hole 12 b.

The holding member 41 has a wire insertion recess 41a for each wire insertion hole 12b (hereinafter referred to as a "wire insertion recess"), and the wire insertion recess 41a is disposed in the wire housing 31 so as to face the wire insertion hole 12b of the sealing member 10 (fig. 1 to 3, 5, 8, 11, 17, and 18). The wire insertion recess 41a of this example is formed in a semicircular shape. In the holding member 40, the holding members 41 are assembled, so that the two wire insertion recesses 41a are circular through holes, and the through holes serve as wire insertion holes 41b through which the electric power feeding wire We is inserted. In the holding

member

40, 2 wire insertion holes 41b are formed.

The holding member 41 is also used as a member for holding the electric wire We drawn out from each wire insertion hole 12b of the sealing member 10 toward the opening 31 a. Therefore, a plurality of projecting portions 41c (fig. 17 and 18) as holding portions projecting radially inward are formed on the inner peripheral surface of the wire insertion recess 41 a. Each of the projecting portions 41c abuts against the outer peripheral surface of the electric wire We inserted into the electric wire insertion hole 41b, and is held by pressing the electric wire We from the outer peripheral surface side.

In addition, the holding member 41 has: a protrusion 41d protruding in an assembling direction with the holding member 41 of the other side; and a groove portion 41e into which the protrusion portion 41d of the holding member 41 of the other side is fitted (fig. 17 and 18). Each holding member 41 is integrated by fitting the protruding portions 41d into the groove portions 41e of the other. Here, a plurality of combinations of the protrusion 41d and the groove 41e to be fitted are provided.

The holding member 40 is held by the wire housing 31. Therefore, a holding mechanism is provided between the wire housing 31 and the holding member 40, and the holding mechanism is constituted by a holding portion 32 provided to the wire housing 31 and a held portion 41f provided to the holding member 41 (fig. 1 to 11). In this example, the holding portion 32 is formed as a claw portion, and the held portion 41f is formed as a hooking portion that hooks to the holding portion 32, and the holding member 40 is inhibited from coming off the opening 31a by hooking the held portion 41f to the holding portion 32. Here, the combination of the pair of holding portions 32 and the held portion 41f is provided at a plurality of locations.

In the connector 1 shown above, for example, the electric wires We are inserted through the electric wire insertion holes 12b of the sealing member 10, and the terminal fittings 20 are connected to the ends of the electric wires We. In the

connector

1, 2 holding members 41 are assembled so as to sandwich the electric wires We with the electric wires We inserted through the electric wire insertion holes 12b, and the holding member 40 is assembled to the electric wires We (fig. 2 to 5). In the connector 1, the seal member 10 and the holding member 40 are assembled by fitting the fitting portions 12e to each other to the fitting portions 40a while moving one or both of the seal member 10 and the holding member 40 in the axial direction on the electric wire We (fig. 6 to 8). In the connector 1, the assembled sealing member 10 and holding member 40 are accommodated in the wire housing 31 from the opening 31a while being shifted in the axial direction on the electric wire We, and the holding member 40 is fixed to the wire housing 31 via the holding portion 32 and the held portion 41f (fig. 9 to 11). At this time, the sealing member 10 is press-fitted to a predetermined position of the wire housing 31 by the holding member 40.

Here, each of the wired terminals 20W may be accommodated in the housing 30 from the opening 31a after the terminal fitting 20 is connected to the end of the wire We, may be accommodated in the housing 30 from the opening 31a after the holding member 40 is assembled to each of the wires We, or may be accommodated in the housing 30 from the opening 31a after the sealing member 10 and the holding member 40 are assembled. In the connector 1, the terminal 20W with the wire is accommodated in the housing 30 at any timing, and the sealing member 10 and the holding member 40 are arranged outside the housing 30 until the accommodating step of the sealing member 10 and the holding member 40 into the wire accommodating portion 31 comes.

As described above, the seal member 10 of the present embodiment includes: the wire insertion hole 12b and the 1 st sealing portion 11a for each wire We; and a 2 nd sealing part 11b corresponding to the inner peripheral surface 31b of the wire housing part 31. In contrast, the conventional sealing member must be assembled for each electric wire and be accommodated in the housing for each electric wire. Therefore, the seal member 10 and the connector 1 according to the present embodiment can improve the assembling workability as compared with the conventional seal member and connector.

In addition, since the seal member 10 of the present embodiment is provided with the rigid body 12 as the reinforcing member and a part of the rigid body 12 is interposed between the adjacent 1 st seal portions 11a, the 1 st seal portion can be suppressed11a except for a lip portion 11a₁Deformation other than deflection of (2), lip 11b of the 2 nd seal part 11b₁Deformation other than deflection. Therefore, in the sealing member 10 of the present embodiment, the lip 11a is used for accommodating the wire accommodating portion 31₁、11b₁Since deformation such as distortion is suppressed, it is not necessary to perform the storing operation while there is a fear of generating useless deformation. Therefore, in this respect, the seal member 10 and the connector 1 according to the present embodiment can improve the assembling workability as compared with the conventional seal member and connector. Further, the sealing member 10 of the present embodiment can suppress deformation during the storage work for the wire storage section 31, and therefore can also suppress unnecessary deformation after the storage work is completed. Therefore, the seal member 10 and the connector 1 of the present embodiment can also suppress a decrease in liquid-proof performance.

Further, the seal member 10 of the present embodiment can be accommodated in the wire accommodating portion 31 integrally with the holding member 40 by the fitted portion 12e and the fitting portion 40a, and can be press-fitted to a predetermined position of the wire accommodating portion 31 by the holding member 40, so that positional displacement in the axial direction of the wire accommodating portion 31 can be suppressed. Therefore, from this point of view, the seal member 10 and the connector 1 of the present embodiment can also suppress a decrease in liquid-proof performance. In this example, the paired fitting-subject portions 12e and the fitting portions 40a are disposed between the adjacent wire insertion holes 12b of the rigid body 12, as described above, near the outer peripheral surfaces 12a as viewed from the imaginary line L. Therefore, when the sealing member 10 and the holding member 40 are accommodated in the wire accommodating portion 31, a force in the accommodating direction can be uniformly applied. Therefore, the seal member 10 of this example can further suppress positional deviation in the axial direction with respect to the electric wire housing 31. Therefore, the seal member 10 and the connector 1 according to the present embodiment can further suppress the deterioration of the liquid-proof performance.

In addition, as described above, the seal member 10 of the present embodiment can suppress the lip portion 11a₁、11b₁Is not deformed, even if the electric wire We outside the housing 30 is externally applied to the electric wire We outside the housing 31 after the accommodation of the electric wire accommodating portion 31 is completedThis force is input and transmitted to the 1 st seal portion 11a, and deformation such as twisting or torsion can be suppressed. Therefore, the sealing member 10 and the connector 1 according to the present embodiment can also suppress a decrease in liquid-proof performance after the connector assembly is completed.

Claims

1. A sealing structure for a connector, comprising:

a housing that accommodates a plurality of terminals with electric wires therein and that draws out electric wires of the terminals with electric wires to the outside;

a sealing member that seals a gap between outer circumferential surfaces of the plurality of electric wires and an inner circumferential surface of the housing; and

a holding member that holds the sealing member,

the housing has an electric wire housing portion that houses a plurality of electric wires therein and draws out the plurality of electric wires from an opening to the outside,

the sealing member includes:

an elastic body which is in close contact with the outer peripheral surfaces of the plurality of parallel wires for each wire and is in close contact with the inner peripheral surface of the wire housing; and

a rigid body having a higher rigidity than the elastic body and having an outer peripheral surface that can be disposed in the wire housing portion so as to face the inner peripheral surface of the wire housing portion with a space therebetween,

the rigid body has a plurality of wire insertion holes through which the wires can be coaxially inserted one-to-one, and the rigid body has a fitted portion which is disposed in the wire housing portion so as to face the opening and into which a fitting portion of a holding member housed in the wire housing portion on the side closer to the opening than the rigid body itself is fitted in the axial direction of the wire insertion holes,

the fitted portion is formed in a concave shape that is concave in the axial direction of the wire insertion hole when the fitting portion is convex, and is formed in a convex shape that is convex in the axial direction of the wire insertion hole when the fitting portion is concave,

the elastic body has a cylindrical 1 st seal portion for each of the wire insertion holes, the 1 st seal portion being in close contact with the outer peripheral surface of the wire inserted in the wire insertion hole with respect to the inner peripheral surface of the wire insertion hole, and the elastic body has a cylindrical 2 nd seal portion, the 2 nd seal portion being in close contact with the inner peripheral surface of the wire housing portion in the wire housing portion with respect to the outer peripheral surface of the rigid body.

2. The seal structure for a connector according to claim 1,

the fitted portion is provided between the adjacent wire insertion holes.

3. The seal structure for a connector according to claim 1,

the fitted portions are disposed between the adjacent wire insertion holes, and are disposed close to one outer peripheral surface side and the other outer peripheral surface side of the rigid body, respectively, when viewed from an imaginary line connecting the shafts of the adjacent wire insertion holes.

4. A seal structure for a connector according to claim 1, 2 or 3,

the rigid body has 2 of the wire insertion holes formed in the same shape, and an outer shape of one side of the wire insertion hole and an outer shape of one side of the other wire insertion hole are formed in a symmetrical shape on the one side of the wire insertion hole and the other side of the wire insertion hole when viewed from an inter-axis center of the 2 wire insertion holes,

the fitted portions are provided on respective outer wall surfaces of the rigid body in the axial direction.

5. A connector is characterized by comprising:

a terminal with an electric wire to which a terminal fitting is connected at a terminal of the electric wire; and

a seal structure for a connector according to any one of claims 1 to 4.